Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
blanking cap pipe union
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: structure-based → ⊑
Identity relative to genus Cap is given by a specific two-piece assembly (a female union sub plus a threaded cap screwed onto it), not a distinguishing function -- it performs the same ClosureFunction as any cap.
Validation status
Why primitive (necessary only)
Reviewer notes
FOL theory & disjointness
First-order logic theory (generated)
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Disjoint with
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Expert review
Axiomatization steps
1
Identity-Giving Function
✓ done
ClosureFunction → ClosureProcess ⊑ MaterialContainment
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COPI-Core operation
MaterialContainment via process parent MaterialContainment
LLM rationale:
Reused verbatim from the already-enriched genus 'cap' per the constructive-type rule: this closes off a line end just as any cap does, differing only in the two-piece union-sub-plus-cap construction.
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Expert review
2
Genus Proximus
✓ done
Cap · Assembly
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Genus (genus proximum)
Most specific superclass — may be a domain class like "Valve" or an IOF-Core root.
BFO/IOF-Core Root
bfo:Object branch
bfo:ObjectAggregate branch
bfo:ImmaterialEntity branch
LLM rationale:
Primary source explicitly describes the concept as 'an assembly of a female union sub... and a threaded cap... screwed onto the union sub to close off fluid flow' -- the same closure purpose as the already-enriched genus Cap, but constructed as a physically-connected, removable two-piece assembly (union sub + cap) rather than a single-piece cap body, so genus_bfo_root is narrowed to Assembly (⊑ MaterialArtifact, not disjoint from Cap's own root) rather than inherited unchanged.
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Expert review
3
Differentia Specifica
✓ done
∃hasComponentPartAtAllTimes.FemaleUnionSub ⊓ ∃hasComponentPartAtAllTimes.ThreadedPipeCap
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Conditions that distinguish
Blanking Cap Pipe Union
from sibling classes under genus
Cap.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
Both named components are verbatim in the primary definition. Reusing the already-enriched ThreadedPipeCap (id 1128) as a component part is a direct, source-grounded cross-reference: the definition's 'a threaded cap that is screwed onto the union sub' names exactly that class.
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Expert review
4
Necessary Parts
✓ done
FemaleUnionSub
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Consider part-whole relations beyond subsumption:
hasComponentPartAtAllTimes (universal, structurally essential)
· hasComponentPartAtSomeTime (contingent, optional component)
LLM rationale:
Only FemaleUnionSub is asserted as a structured necessary_parts entry. The definition's 'threaded cap' component is this session's own already-enriched ThreadedPipeCap class (id 1128) -- deliberately NOT re-declared here as a necessary_parts stub, to avoid emitting a second, redundant owl:Class declaration for an IRI that already carries its own full axiom set elsewhere in the same published file; the relationship is documented in differentia_nl/cross_standard_notes as prose instead.
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Expert review
5
Process Participation Signature ⟨I, O, T⟩
✓ done
∅ → ∅
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Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
Same passive-closure signature as the genus Cap.
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Expert review
More
Alternative labels
none
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Synonyms / alternative labels (comma-separated) — skos:altLabel
Language auto-detected on export (PT if the label contains accents, EN otherwise).
Properties as BFO qualities
no CFIHOS/DEXPI properties
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No CFIHOS/DEXPI properties found for this cluster.
Custom axioms
none
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Axioms not produced by the pipeline. Each is appended verbatim as an
rdfs:subClassOf restriction on Blanking Cap Pipe Union.
Write the restriction block in Turtle syntax (without the leading
rdfs:subClassOf).
Example: [ owl:onProperty :hasPart ; owl:someValuesFrom :Wellhead ]
Cross-standard divergences
none detected yet
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Click "Detect divergences" to analyse cross-standard disagreements for this cluster.
